From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756445Ab2IKRoP (ORCPT ); Tue, 11 Sep 2012 13:44:15 -0400 Received: from devils.ext.ti.com ([198.47.26.153]:33196 "EHLO devils.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752516Ab2IKRji (ORCPT ); Tue, 11 Sep 2012 13:39:38 -0400 From: Cyril Chemparathy To: , CC: , , , , , , Cyril Chemparathy , Vitaly Andrianov Subject: [PATCH v3 17/17] ARM: mm: clean up membank size limit checks Date: Tue, 11 Sep 2012 13:39:15 -0400 Message-ID: <1347385155-11643-18-git-send-email-cyril@ti.com> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1347385155-11643-1-git-send-email-cyril@ti.com> References: <1347385155-11643-1-git-send-email-cyril@ti.com> MIME-Version: 1.0 Content-Type: text/plain Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This patch cleans up the highmem sanity check code by simplifying the range checks with a pre-calculated size_limit. This patch should otherwise have no functional impact on behavior. This patch also removes a redundant (bank->start < vmalloc_limit) check, since this is already covered by the !highmem condition. Signed-off-by: Cyril Chemparathy Signed-off-by: Vitaly Andrianov --- arch/arm/mm/mmu.c | 19 +++++++++++-------- 1 file changed, 11 insertions(+), 8 deletions(-) diff --git a/arch/arm/mm/mmu.c b/arch/arm/mm/mmu.c index 6c35483..50d9df5 100644 --- a/arch/arm/mm/mmu.c +++ b/arch/arm/mm/mmu.c @@ -917,10 +917,15 @@ void __init sanity_check_meminfo(void) for (i = 0, j = 0; i < meminfo.nr_banks; i++) { struct membank *bank = &meminfo.bank[j]; + phys_addr_t size_limit; + *bank = meminfo.bank[i]; + size_limit = bank->size; if (bank->start >= vmalloc_limit) highmem = 1; + else + size_limit = vmalloc_limit - bank->start; bank->highmem = highmem; @@ -929,8 +934,7 @@ void __init sanity_check_meminfo(void) * Split those memory banks which are partially overlapping * the vmalloc area greatly simplifying things later. */ - if (!highmem && bank->start < vmalloc_limit && - bank->size > vmalloc_limit - bank->start) { + if (!highmem && bank->size > size_limit) { if (meminfo.nr_banks >= NR_BANKS) { printk(KERN_CRIT "NR_BANKS too low, " "ignoring high memory\n"); @@ -939,12 +943,12 @@ void __init sanity_check_meminfo(void) (meminfo.nr_banks - i) * sizeof(*bank)); meminfo.nr_banks++; i++; - bank[1].size -= vmalloc_limit - bank->start; + bank[1].size -= size_limit; bank[1].start = vmalloc_limit; bank[1].highmem = highmem = 1; j++; } - bank->size = vmalloc_limit - bank->start; + bank->size = size_limit; } #else /* @@ -962,14 +966,13 @@ void __init sanity_check_meminfo(void) * Check whether this memory bank would partially overlap * the vmalloc area. */ - if (bank->start + bank->size > vmalloc_limit) - unsigned long newsize = vmalloc_limit - bank->start; + if (bank->size > size_limit) { printk(KERN_NOTICE "Truncating RAM at %.8llx-%.8llx " "to -%.8llx (vmalloc region overlap).\n", (unsigned long long)bank->start, (unsigned long long)bank->start + bank->size - 1, - (unsigned long long)bank->start + newsize - 1); - bank->size = newsize; + (unsigned long long)bank->start + size_limit - 1); + bank->size = size_limit; } #endif if (!bank->highmem && bank->start + bank->size > arm_lowmem_limit) -- 1.7.9.5